The primary objective of this thesis is the development of a dedicated thermal test rig intended for the experimental evaluation of key components of an electric powertrain lubrication circuit under controlled temperature and pressure conditions. The setup was designed and assembled at Garrett Advancing Motion with the purpose of enabling systematic and repeatable characterization of the electric oil pump, oil filter and heat exchanger, which represent critical elements for the reliability and overall efficiency of modern electrified powertrains. The rig, developed at Garrett Advancing Motion, is specifically designed to test the oil pump, oil filter, and heat exchanger, components essential to the reliability and efficiency of electric powertrain systems.